Plasma-Induced Heating Effects on Platinum Nanoparticle Size during Sputter Deposition Synthesis in Polymer and Ionic Liquid Substrates
Artikel i vetenskaplig tidskrift, 2021

Nanoparticle catalyst materials are becoming ever more important in a sustainable future. Specifically, platinum (Pt) nanoparticles have relevance in catalysis, in particular, fuel cell technologies. Sputter deposition into liquid substrates has been shown to produce nanoparticles without the presence of air and other contaminants and the need for precursors. Here, we produce Pt nanoparticles in three imidazolium-based ionic liquids and PEG 600. All Pt nanoparticles are crystalline and around 2 nm in diameter. We show that while temperature has an effect on particle size for Pt, it is not as great as for other materials. Sputtering power, time, and postheat treatment all show slight influence on the particle size, indicating the importance of temperature during sputtering. The temperature of the liquid substrate is measured and reaches over 150 °C during deposition which is found to increase the particle size by less than 20%, which is small compared to the effect of temperature on Au nanoparticles presented in the literature. High temperatures during Pt sputtering are beneficial for increasing Pt nanoparticle size beyond 2 nm. Better temperature control would allow for more control over the particle size in the future.

Författare

Rosemary Brown

Chalmers, Fysik, Kemisk fysik

Björn Lönn

Chalmers, Fysik, Kemisk fysik

Robin Pfeiffer

Student vid Chalmers

Henrik Frederiksen

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

Björn Wickman

Chalmers, Fysik, Kemisk fysik

Langmuir

07437463 (ISSN) 15205827 (eISSN)

Vol. In Press

Ämneskategorier

Annan kemiteknik

Annan kemi

Annan materialteknik

DOI

10.1021/acs.langmuir.1c01190

PubMed

34253018

Mer information

Senast uppdaterat

2021-08-10